Machine for polishing leather.



No. 645,886. Pat ented Mar. 20, I900. F. BREIDENBACH.

MACHINE FOB POLISHING LEATHER.

(Application AM Feb. 4, 1899.)

(No Model.)

THE Nonms PETERS co. Puma-urns wasmuamm 0, c4

UNITED STATES FRANZ BREIDENBAOH,

PATENT 'QFFICEQ or BERLIN, GERMANY.

MACHINE Foe POLISHING LEATHER.

SPECIFICATION forming part of Letters Patent No. 645,886, dated March20, 1900-. Application filed February 4, 1899. Serial No. 704,577. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, FRANZ BREIDENBACH,

leather-dyer, asubject of the King of Prussia, German Emperor, residingat 17 Gerichtstrasse, Berlin, in the Kingdom of Prussia,

her 18, 1898,) of which the following is a speci fication.

In machines for the polishing or glazing of leather which work bypassing a roller attached to the free end of a vertically-swinging rodunder heavy pressure across the surface of the leather the defect hasmade itself manifest that the manipulated surface, in consequence of thenot-always-uniform thickness of the leather, is subjected atdiiferentplaces to unequal pressure. In this way there is produced notlonly anirregularstretching of the upper skin, with the consequent formation ofridges on it; but'the places which are harder pressedt-hat is,where theroller bears v with the greatest force'-als o receive a higher polishthan the places which are treated less vigorously. Further, theappearance and the utility of the finished article is more or lessdeteriorated. Ithappens, moreover, thatin consequence of the directaction of the roller on the texture of the leather at each change in thedirection of the swinging carrying-rod a blow is givenby the roller onthat part of the leather which itfirst touches, whereby indentations areproduced that are Very difficult to get rid of. On this account also themost careful guiding of the leather under the roller acting upon it isnecessary-that is to say, at each change in the direction of the latterit is to be directed toward the part to be treated by starting always atthe middle of the surface. By the dropping of the lubricating substancefrom the bearings of the roller as it passes rapidly backward andforward under great pressure sometimes spots of grease are made on theupper surface of .0, which is attached to the swinging lever a andactuated by the rod 1), is a thin band of sheet-brass or other suitablematerial of a breadth equal to or somewhat greater thanthe length of theroller and placed parallel to its stroke. The end of this band which istoward the framee of the machine is fixed be tween a clamp from whicheither spiral springs or elastic cords g extend, which again arefirmlyat-lached tothe frame by clamps h or in any other manner. In thesame manner by using clamps f and spiral springs or elastic cords g theband is fixed at the oppo site end bya detachable connection to an armit, which stretches out from the frame 6 at a point i rather beyond thefarthest point of oscillation of the roller. This arm is at the sametime a carrier for the roller Z, which takes up in several folds thefree end of the band, which extends beyond the clamp f.

Forplacing the band exactly in its right position it is arranged to beadjustable Within fixedlimits.

For the manipulation of the leather m it is placed with the right sideupward between the band g and the upper surface of the table at when thelatter, which is adjustable vertically upon the upright supports 0, isin its lowest position. By then elevating the table the band (1 liesdirectly upon the surface of the leather, against which it ispressedwith great force by the roller 0, which is at once set in actionat the places where this is in contact. This pressure coming onlyindirectly on the leather and being distributed by the interveningmaterial, while the surfaces of the roller and the leather do not toucheach other, combined with the rubbing to which the surface of theleather is subjected by the motion backward and forward of the band (Icaused by the roller pressing upon it and assisted by the action of thespiral springs g g, is the means of obviating all the defects which areproduced in the finished goods by the appliances hitherto in use. Thepolish or glaze on the surface of the leather is now perfectly uniform,and the ridges are entirely obviated or are inconsiderable. The leathercan now be brought under the pressure of the roller, starting from anyarbitrary place on its surface, and may be spread out so that everyplace is subjected during an equal time to the influence of the roller.The oil also which may happen to drop from the axle of the roller iscaught by and rendered harmless by the band, which lies as a protectionunder the places of leakage and over the leather.

Having now described my invention, what I claim, and desire to secure byLetters Patcut, is-

In a machine for manipulating leather the combination of a band 61 ofbrass or other material swinging freely,and attached at both ends bymeans of spiral springs or elastic cords g g to points of suspension ht' and 00- cupying a position immediately over the leather to bemanipulated and close under and parallel to the stroke of the operatingpress-roller preventing direct contact between the surfaces of theroller and of the leather and obviating the objectionable form of theimpressions made on the texture of the leather which results from therevolution of the roller substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

FRANZ BREIDENBACI'I.

Vitnesses:

-ERURIS L. GOLDSCHMIDT,

HENRY HARPER.

